Today in 1949, US Patent 2481897 A was issued, an invention of Zack Anderson, for his “Device For Separating Leaves, Stems, and Other Material From Hops.” There’s no Abstract, although in the description it includes this summary:

This invention pertains to separators and particularly to a machine for separating leaves, stems, and other material from hops.

The present invention relates to a machine for separating the hops from the leaves, stems, and other material more efficiently than has heretofore been accomplished. Due to novel features of the machine the separating action is positive and precise. These novel features also enable the machine to accomplish precise results under varying hop-crop conditions.